I´ve found the solution in the message #865627.



>Hi,
>
>When I try to set the bindingsource property at design time I got an error message "Error message: The parameter is incorrect.".
>
>

>---------------------------
>
>---------------------------
>Error message: The parameter is incorrect.
>
>   at EnvDTE.ProjectItem.get_FileNames(Int16 index)
>
>   at OakLeaf.MM.Main.Builders.mmBindingSourceWebMemberEditForm.GetDatabaseInfo()
>
>   at OakLeaf.MM.Main.Builders.mmBindingSourceWebMemberEditForm.Init(Object value)
>
>   at OakLeaf.MM.Main.Builders.mmBindingSourceWebMemberEditForm..ctor(Object value, Control currentControl, ITypeDescriptorContext context)
>---------------------------
>OK
>---------------------------
>

>
>This problem happens in a web project. I use the same Business Object project in a windows project without problems.
>
>How can I fix this?
>
>Thanks in advance,
>
>Eugênio